Hammer



FIG. 1 is a side elevational view of a hammer showing my new design;

FIG. 2 is a top plan view thereof, the bottom view being identical;

FIG. 3 is a left end elevational view thereof;

FIG. 4 is a cross-sectional view thereof taken along line 4--4 of FIG. 3; and,

FIG. 5 is a right end elevational view thereof. 

The ornamental design for a hammer, as shown and described. 